SOAR is a great way to get a head start on meeting new people. Talk to everyone you sit next to even if it's just to ask their major or where they are from. Even if you think you are being obnoxious chances are the people around you are just as anxious to meet other students. There is usually information about some party(s) going on floated around so make sure to write it down somewhere just in case you do end up with nothing to do that day.
Volunteering somewhere a few hours a week is always a great way to meet decent or interesting people.
Become one of the regulars at a coffee shop, diner, or shop you enjoy. The other regulars will take notice and usually make an attempt to meet you if you don't do it first.
A good rule of thumb is if you run into the same person three times, it's okay to introduce yourself and strike up a conversation. It's not that weird if you're not weird about doing it. Be funny, be personable, try out your favorite Eddie Murphy jokes on someone else than your cat!
Go to a club meeting, even if you are only mildly interested in the club's focus. You can always leave, but you're likely to find someone you have something in common with.